title: Long-term intraocular pressure changes after vitrectomy for epiretinal membrane and macular hole.
abstract: BACKGROUND
  To investigate long-term intraocular pressure (IOP) changes after vitrectomy for epiretinal membrane (ERM) or macular hole (MH).
  
  
  METHODS
  We retrospectively reviewed the medical records of 57 eyes with ERM and 61 eyes with MH that underwent vitrectomy. IOP levels and changes at 1, 3, 6, 12 months, and the final visit from baseline were evaluated in vitrectomized eyes and non-vitrectomized fellow eyes.
  
  
  RESULTS
  In the ERM group, the mean follow-up period was 29.3 months; the mean preoperative IOP in the operated eyes was 12.9 ± 2.5 mmHg and the final IOP was 13.2 ± 2.9 mmHg. In the MH group, the mean follow-up period was 25.6 months; the mean preoperative IOP in the operated eyes was 13.3 ± 2.5 mmHg and the final IOP was 14.0 ± 3.2 mmHg. The mean final IOP of the fellow unoperated eyes was 13.0 ± 2.5 mmHg in the ERM group and it was 12.9 ± 3.2 mmHg in the MH group. A significant difference was found between the operated eyes and fellow eyes at the final visit in the MH group (P < 0.01) but not in the ERM group (P = 0.40). MH group was significantly at high risk of IOP increase after vitrectomy (P < 0.01).
  
  
  CONCLUSIONS
  IOP increase after vitrectomy was found in some eyes with MH during long-term follow-up but it was unlikely in eyes with ERM.
authors.affiliation: Department of Ophthalmology, Shiga University of Medical Science, Seta Tsukinowacho, Otsu, Shiga, 520-2192, Japan, fujikawa@belle.shiga-med.ac.jp.
authors.forename: Masato
authors.initials: M
authors.lastname: Fujikawa
authors.forename: Osamu
authors.initials: O
authors.lastname: Sawada
authors.forename: Masashi
authors.initials: M
authors.lastname: Kakinoki
authors.forename: Tomoko
authors.initials: T
authors.lastname: Sawada
authors.forename: Hajime
authors.initials: H
authors.lastname: Kawamura
authors.forename: Masahito
authors.initials: M
authors.lastname: Ohji
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D058450:Endotamponade; D019773:Epiretinal Membrane / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D016684:Prone Position; D012167:Retinal Perforations / Q000601:surgery*; D012189:Retrospective Studies; D014065:Tonometry, Ocular; D014821:Vitrectomy